USR369 direction: make sure the old-zips-ref/index exclusion is "the way it is done from now on" and that all systems know. Updated SOP-SNAPSHOT-EXCLUDE.md itself from "gap, filed to Server[40], not yet done" to "STATUS: DONE" with the confirmed test numbers (10,657->3,449 files). Updated its SOP-INDEX.md summary entry to match (was still saying "not yet done" after the code fix landed). Sent a platform-wide broadcast (id 99, no targets restriction -- all systems, not just Admin[00]/Master[10] who were notified individually earlier) making explicit that this is a standing change, not a temporary state, and that no action is needed from any system.